Question

4x+3y=7

Answer 1

solve each side and set the opposite value equal to zero

Answer 2

so 4x = 7 and 3y = 7

Answer 3

now solve

Answer 4

so x=7/4 and y=7/3?

Answer 5

you cannot solve for x and y if you are only given one equation. two unknowns require two equations in order to solve for them.

Answer 6

tunykabir youre correct

Answer 7

most definitely not correct

Answer 8

e.g. I could just as well say that x=1 and y=1 will satisfy that equation.

Answer 9

with one equation and two unknowns there are an infinite number of solutions.

Answer 10

I just need a step by step on how to do this. i haven't done this in a long time, and i totally forgot. haha..

Answer 11

as I said - you cannot "solve for x and y" if you are given just one equation.

Answer 12

yes you can. i know that there is an answer. im on mathxl, and i have to put something in.

Answer 13

its only solve for y

Answer 14

what "exactly" is the question here? all you have stated is an equation.

Answer 15

do you mean write an expression for y in terms of x?

Answer 16

because that CAN be solved

Answer 17

um. all it says is solve the following for y.
4x+3y=7
y=

Answer 18

yes, so it is asking for y in terms of x

Answer 19

yeah, thats what it means

Answer 20

4x + 3y = 7

what you need to do is move the term involving x to the right-hand-side of the equals sign

Answer 21

do you know how to do that?

Answer 22

yes, so it would be 3y=-4x+7

Answer 23

perfect!
next you divide both sides by 3

Answer 24

yeah....thats the part that i get confused on. y=-4x+7/3?

Answer 25

you should use brackets to avoid confusion, so write it as:

y = (-4x + 7)/3

Answer 26

or even:

y = (7 - 4x)/3

Answer 27

so how would i divide that?

Answer 28

that is the final answer

Answer 29

OH. wow. im here trying to solve it. HAHA. thankyou.

Answer 30

yw :)